package com.ssm.inter;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 * Created by Lenovo on 2019-10-3.
 */
public class MyInterceptor implements HandlerInterceptor {
    public boolean preHandle(HttpServletRequest request,
                             HttpServletResponse response, Object handler)
                              throws Exception {
        HttpSession session=request.getSession();
        String username= (String) session.getAttribute("username");
        if (username==null)
        { request.getRequestDispatcher("/login.jsp").forward(request,response);
            return  false;}
        else
        {return true;}
    }
    public void postHandle(HttpServletRequest request,
                            HttpServletResponse response, Object handler,
                            ModelAndView modelAndView) throws Exception {

    }
    public void afterCompletion(HttpServletRequest request,
                                 HttpServletResponse response, Object handler,
                                 Exception ex) throws Exception {
    }
}
